Established in March 1980 as a one-man consulting firm, our company has been dedicated to providing reliable and effective environmental engineering services to the private, commercial, governmental, and public sectors. Over the years, we have experienced significant growth and market stability, allowing us to expand our expertise and take on highly specialized technical projects.

In January 1986, we formed Chemical and Engineering Services Corporation (CHES), which operates under the name Fernando L. Rodríguez, PE & Associates (FLRA). This step was taken to establish a robust management system capable of handling diverse services and to facilitate our expansion to the U.S. Mainland, Central/South America, and the Caribbean Region. With our offices based in San Juan, Puerto Rico, we have positioned ourselves to serve clients across these regions. In March 2015, we further expanded our services by formalizing IEMES, PSC, the company that allows us to strengthen our offering of professional engineering services, which was most recently (September 2024) certified by the U.S. Small Business Administration (SBA) as a Women-Owned Small Business (WOSB). 
Our team of experienced professionals possesses a diverse range of expertise in the management, technical, legal, and operational aspects of environmental control systems. We are well-versed in addressing air, noise, and water pollution, as well as solid/hazardous waste management and control, including safety and industrial hygiene assessments. Furthermore, our multi-disciplinary technical/engineering staff excels in designing and supervising the construction of wastewater treatment plants, air emission controls, solvent recovery operations, HVAC systems, and associated buildings and structures.

We have the knowledge and capabilities to meet federal and commonwealth regulatory requirements, including the design of clean rooms and sterile areas. Since 1990, we have been actively involved in providing accredited trainings and management projects related to Asbestos Containing Materials (ACM) and Lead-Based Paints (LBP) management, as mandated by the local Department of Natural and Environmental Resources (PRDNER), previously the Environmental Quality Board (EQB). We have trained thousands of professionals, including representatives from government entities, commercial organizations, industrial sectors, consultants, and abatement contractors. In addition, we offer training programs under the Environmental Management Systems Auditing (EMSA) framework, which align with International Standards Organization (ISO) requirements. This training is essential for companies engaged in international trading and operations worldwide. Our founder, Mr. Rodríguez, has delivered accredited courses in Puerto Rico, the Caribbean, and several countries in Central/South America, including Chile and Mexico, since 1996.
As active members of the U.S. Green Building Council (USGBC) - Caribbean Chapter, we contribute to the development of LEED compliance design and programs for existing and new building structures in the United States. Additionally, we actively participate in the Solid Waste Association of North America (SWANA) as members of the SWANA Caribbean-Puerto Rico Chapter. Our team holds SWANA Certified Professional credentials in Landfill Operations, Municipal Solid Waste (MSW) Recycling Systems, MSW Collection Systems, and Integrated Waste Management.​
​With our extensive expertise and certifications, we are well-equipped to address a wide range of environmental challenges and provide comprehensive solutions to our clients.